Steam-engine.



G. PSARBAS I N. BALBZOS.

STEAM ENGINE.

APPLICATION FILED MAYIz, 191;.

1,016,955, Patentedv Feb. 13, 1912,

Z SHEETS-SHEET 1.

G. PSAREAS L N. BALEZOS.

STEAM ENGINE.

APPLICATION FILED MAY 12,1911.

19016955, Patented Feb. 13,1912.

ATTORNEY.

unan sra Gnomn rsannas AND NICK BALEzos, or noLYoKn, MASSACHUSETTS.

STEAM-ENGINE.

Specification of Letters Patent.

Patented Feb. 13, 1912.

Applicationled May 12, 1911. Serial No. 626,765.

Engines, of which the following is a full, clear, and exact description.

The object of this invention is to provide a duplex reciprocating steam engine which is especially suitable for use as a pumping engine, which is of extremely simple construction and eiiiciency of operation, and in which the valves, and the controlling means there- `for, are located in the steam chest, and in which each-valve controls both the steam inlet and exhaust ports of each cylinder, such valves being governed by the action of the pistons in their reciprocatory movements.

By reason of the organization of the valve mechanism comprised in this engine, including the controlling devices therefor, the two valves are constrained to have their movements each in a. particular manner and time with reference to the other, so that, for eX- ample, a piston upon coming to the right hand vend of its cylinder will establish conditions for the forcing of the other piston then in the same end of the other cylinder to the left hand end, whereupon such piston arriving at the left hand end"will. establish conditions for bringing the first named piston also to such left hand end, whereupon both pistons are again moved'in close succession to the right hand end, and so on, repetitively in such orderduring the running of the engine.

Under our improved valve constructions and means for the control thereof, the strokes of the two pump pistons carried by the piston rods of the steam cylinder' will be successively moved forwardly in the same direction, then successively moved backward in the same direction, so that a given stroke of one piston is followed a supplement of its stroke, by the other piston moving in the same direction, whereupon the pumping impulses o'f the second piston is practically a continuation of the first one, so that a maximum of pumping pressure is exerted. And by having the steam cylinder valves and their controlling mechanism at locations inclosed by, and adjacent, the steam chest, so that no portion of the valve mechanism requires space for occupancy at or alongside portions of the piston rods between the steam cylinders and the pump cylinders, these cylinders, usually united by an integrally east web or yoke, may be arranged i'n much closer endwise relations than heretofore, so that the length of space necessary to be occupied by the pumping engine as a whole may be considerably less than heretofore usual. y

The steam engine improvements are del scribed in connection with the accompanying drawings which show the engine in conjunction with a pump, and are set forth in the claims.

In the drawings :MFigure l is a side elevation of the engine and a pump designed to be used in conjunction therewith. Fig. 2 is a sectional view of the pump taken on the line Q--Q'Fig 1, showing the arrangement of the valves therein. Fig. 3 is a plan view of the pump as seenobe'low the line 3-3, Fig. 1, showing one of the valve plates. Fig. i is a plan view as seen below line 4 4, ig. 1,

-showing the steam chest of the engine and the arrangement of the valves and valve operating frames therein. Fig. 5 is a vertical longitudinal sectional View through the engine, taken along the axis of one of the cylinders thereof. Fig. 6 is a cross sectional view of the engine taken on line 6 6, Figi l.

ln the drawings t-7-7 represent the cylinders of the duplex pumping steam engine.

in which reciprocate the, pistons 8 8. Above the upper walls of the cylinders is the steam chest 9, which is connected with the cylinders by means of the channels 10-10, each of which has the ports 12 -and 12 into said steam chest, through which the steam enters the cylinder and through which it is latterly exhausted. The two ports 12, 12 for each channel are to all intents and purposes the same as a single wide port, but the small partitioning portion between them affords increased base having surface for the slide valve, next referred to. ln the steam chest are two slide valves 13 and 13 each having a chamber lll in the bottom thereof, and having a groove in the top which engages for a sliding movement with the guide rod 15, the pair of which extend longitudi- Y nally in the steam chest and have thereon the stops 16, which serve to limit the movements of the valves 1.3-1.3. The valve 13 is connected, through the lover 17, to the blocks 19--19 which are rigidly connected by the frame 20, said lever 17 being by pivot 18, at its center, connected to the bottom wall of the steam .chest asshown in Figs; .Il and 6.

The frame and the valve 13 have the lugs projecting therefrom having longitudinal slots therein in which the extremities of the lever 17 engage to allow for a sliding movement of thelever therein as the piston 8 imparts motion to said valve 13 through the frame 2O and the-lever 17. The valve 13 is positively connected to the blocks 22-22 by the rigid frame 23.

Each block 19-1922--22 has a pin 24 secured thereto and protruding downwardly therefrom into its respective cylinder through an aperture 11 therefor in the bottom wall of the steam chest, at the opposite ends of the cylinder, said blocks serving to close the mouths of the apertures and preventing any uncalled for entrance of steam from the cylinder into the steam chest, and vice versa. 'f

An exhaust pipe a is provided which is connected through the medium of the chambers 14 in the valves 13 and 13 with the exhaust orts 12 from the cylinders, 'by way of t e exhaust passage 25 with. which such pipe 25 has communication.

. The steam enters the steam vchest through the inlet pipe' 26, and the one port being open, as in F igs,` 4 and 5, the steam passes therethrough to the cylinder 7 forcing the piston forward until it strikes the pin 24 at the left which is moved forward, and by means of the block 22, and the frame 23 connecting i it with the valve 13', said valve 13 is moved forward and the steam inlet port is uncovered allowing the steam to enter the cylinder 7 therethrough and to force the piston 8 forward to engage the pin securedto the block v19, when the operation is the reverse of the one described. When each valve is at the extreme of its sliding movement, the chamber 14 in the bottom thereof covers the exhaust' port from the cylinder and alsov the port o r end of the passage 25 incommunication with the exhaust pipe 25n so the steam is allowed to escape from the cylinder through the exhaust port therefrom', through l .the chamber 14, and through the exhaust .steam entrance, while the left hand port 12 leading to the other steam cylinder 7. is gpen for exhaust,- the piston in the cylinder l .being understop'd as having finished its rifhtward stroke and'at the right hand end .'0 end of the cylinder 7 will finally force the .its cylindem'thesteam in the right hand piston 8 to the extreme leftward in such will be moved to the left, .whereupon the right yhand port appurtenant to cylinder 7 willbe openedso that while the piston 8 remains in its extreme leftward position the piston 8 in the other .cylinder will move down to its extreme leftward position; but such piston 8 in coming to the leftward position will move the blocks 19, 19 and connecting frame 20, and through the lever 17 will move the slide valve 13 to the rightward so that the piston 8 will correspondingly move rightward, Iwhereupon on the reaching of its limit of movement in that direction by strikingvagainst the depending pin 24, the slide valve appurtenant to the piston 8 is shifted or reversed so that that piston 8 is moved down to the' same end of the engine as occupied, in the other cylinder, by the piston 8. lAnd it is, therefore, to be clearly understood that the piston moving to the leftward is followed in the same leftward direction by the second piston which on its arrival at the left hand end establishes conditions causing the first piston to be driven to the rightward so that upon its arrival at the end of its rightward stroke,`

the rightward strokev of the second piston will commence. Thus the stroke of the rela- 4tively second piston is in continuation ofthat of the first one so that the pump pistons are correspondingly operated by very long, v,

strong, high pressure pumping impulses.`

In conjunction with the steam engine herein described and illustrated (the use of which is most extensively in connection with a pump), the steam pump is shown as comprising the pumping cylinders 27-27 in Which reciprocate the pistons 28-28 actuated by the piston rods 29-29 to the other extremity of which are secured the steam pistons 8 8 respectively. The water enters the pump through Athe inlet pipe 30 and .passes alternately through the valves 31-31 on the backward stroke of the pistons 28-28 and the forward stroke of the pistons cause the closing of the valves 31-31 and the water is forced through. the valves 32-32 and out of the outlet pipe 33.

lVe claim 1. In a duplex pumping steam engine, in

combination, 'a pair of cylinders arranged side by side, and a steam chest thereover,

having oppositely located sets of inlet and exhaust ports leading from the steam chest to the respective cylinders, and having opposite pairs of apertures communicating between the end portions of the cylinders and the valve chest, a pair of slide valves um throu h the I p p g fox' alei'imtelv opening and eloeiog the its of the etidzthle iii the Steam Chest and heff'ing memhere "nfojeotin'g 'through Suid ape-tui'es into the ooposite ends of cylinders to be elteitou ely engaged hv the pistons, one of the ieioes evei one cylinder, having operative connection with the Slide valve controlling the norte off the other `3}Yi,`i11f l s31'7 and. means bete 11 the otlw of seid frames and 'the .Letively opiosite Slide valve for causing iioii the movements of such freine, the sltliog movement of the latter named valve.,

lne duplex pumpiig steam engine, eoiihinetioo. pair of eylioclere arranged by side, and fi` steam chest thereover, y* tfnoeitely looetecl Sets of inlet end "1 poet leading from the steam chest espee Je Cylinders, and having o puits of' apertures communicating between the enel portions of the Cylinders le valve chest, e, peli of Slide valves teiiiotely opening and closing' the th ifespective cylinders, frames, the steam chest and having memtin. through said. epeitut'es into ofthe eylizirlel's to i'r-e ul.- agetl by the pietone, one of over one i/lieder having traneoonneetiz'ig it with the slide the ports of the other evvi- :cl en ihteimeclietely pivotetl le@ le other fiume und the Slide valve pposite thereto.

A yompi'ig' stema engine7 in, I the oylinde. l having steam ust ports opening theizei'oto, 'theeiig Slide valves for eltemately emeetive 'ovlindere. framesV openihggind closing the inlet ports and hevingehambers in the hase 'thereof fol alternately opening and. closing the exhaust porte, and also having grooves in their top7 guide rods above the 'valves 'with which the grooved tops of the valves engage, stops on Seid zotfls for limiting the movements of the valves, pin protruding downwardly from the Steam chest into the elyl'linders, sliclehle blofke hy which seid pins efe eerrie, meent; for uniting a pair of blocks, and means operated by the united peli of blocks for operating the slide velvee, respectively opposite thereto.

et. In a reciprocating steam engine, in combination, a steam chest., e cylinder, and i: wall sepei'eting them7 having exhaust and inlet por-ts, and also having apertures lee ling 'through the seid Wall from the steam chest, to -opposite ends of the Cylinders, a slide valve for alternately opening and closing the inlet and exhaust ports, a piston in the eylindeiand a frame slideble in the steam chest, comprising blocks having closing relations to seid apertures and provided with pins extending through Seid apertures into the opposite enfle of the Cylinders to be elte" etely' engaged end moved by the pist-on, sa, ci franies operatively (2o-acting with the Slide valve.

Sigeecl. hy at Springfield, Mess., in presence ot" two subscribing Witnesses.

G. PSAREAS.

CK BAL-E203. 

